如图,在△ABC中,AB=AC,D是BC上一动点,E,F分别在AB,AC上,且BE=CD,BD=CF∠EDF与∠A在数量上有什么关系画的不好表介意=-=PS:上课听老师说到一点,要用外角性质做,三角形的一个外角等于与它不相邻
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![如图,在△ABC中,AB=AC,D是BC上一动点,E,F分别在AB,AC上,且BE=CD,BD=CF∠EDF与∠A在数量上有什么关系画的不好表介意=-=PS:上课听老师说到一点,要用外角性质做,三角形的一个外角等于与它不相邻](/uploads/image/z/15235397-53-7.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CAB%3DAC%2CD%E6%98%AFBC%E4%B8%8A%E4%B8%80%E5%8A%A8%E7%82%B9%2CE%2CF%E5%88%86%E5%88%AB%E5%9C%A8AB%2CAC%E4%B8%8A%2C%E4%B8%94BE%3DCD%2CBD%3DCF%E2%88%A0EDF%E4%B8%8E%E2%88%A0A%E5%9C%A8%E6%95%B0%E9%87%8F%E4%B8%8A%E6%9C%89%E4%BB%80%E4%B9%88%E5%85%B3%E7%B3%BB%E7%94%BB%E7%9A%84%E4%B8%8D%E5%A5%BD%E8%A1%A8%E4%BB%8B%E6%84%8F%3D-%3DPS%EF%BC%9A%E4%B8%8A%E8%AF%BE%E5%90%AC%E8%80%81%E5%B8%88%E8%AF%B4%E5%88%B0%E4%B8%80%E7%82%B9%EF%BC%8C%E8%A6%81%E7%94%A8%E5%A4%96%E8%A7%92%E6%80%A7%E8%B4%A8%E5%81%9A%EF%BC%8C%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E4%B8%80%E4%B8%AA%E5%A4%96%E8%A7%92%E7%AD%89%E4%BA%8E%E4%B8%8E%E5%AE%83%E4%B8%8D%E7%9B%B8%E9%82%BB)
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